2016-12-03 02:14:14 +07:00
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<?php
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2018-09-02 10:17:27 +02:00
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declare(strict_types=1);
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2016-12-03 02:14:14 +07:00
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namespace GraphQL;
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use GraphQL\Executor\Promise\Adapter\SyncPromise;
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class Deferred
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{
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2018-09-02 10:17:27 +02:00
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/** @var \SplQueue */
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2016-12-03 02:14:14 +07:00
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private static $queue;
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2018-09-02 10:17:27 +02:00
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/** @var callable */
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2016-12-03 02:14:14 +07:00
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private $callback;
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2018-09-02 10:17:27 +02:00
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/** @var SyncPromise */
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2016-12-03 02:14:14 +07:00
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public $promise;
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public static function getQueue()
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{
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return self::$queue ?: self::$queue = new \SplQueue();
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}
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public static function runQueue()
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{
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2016-12-04 15:49:34 +07:00
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$q = self::$queue;
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2018-09-02 10:17:27 +02:00
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while ($q && ! $q->isEmpty()) {
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2016-12-03 02:14:14 +07:00
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/** @var self $dfd */
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$dfd = $q->dequeue();
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$dfd->run();
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}
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}
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public function __construct(callable $callback)
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{
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$this->callback = $callback;
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2018-09-02 10:17:27 +02:00
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$this->promise = new SyncPromise();
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2016-12-03 02:14:14 +07:00
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self::getQueue()->enqueue($this);
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}
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public function then($onFulfilled = null, $onRejected = null)
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{
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return $this->promise->then($onFulfilled, $onRejected);
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}
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2018-09-02 10:17:27 +02:00
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public function run() : void
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2016-12-03 02:14:14 +07:00
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{
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try {
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$cb = $this->callback;
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$this->promise->resolve($cb());
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} catch (\Exception $e) {
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$this->promise->reject($e);
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2017-06-06 12:55:38 +02:00
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} catch (\Throwable $e) {
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$this->promise->reject($e);
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2016-12-03 02:14:14 +07:00
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}
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}
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}
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